Numerical simulation of terrain and buildings-triggered low-level wind shear around Zhuhai Airport
To analyze the influence of complex terrain and buildings on the wind field of Zhuhai Airport and whether they will induce low-level wind shear,the Computational Fluid Dynamics(CFD)code FLUENT was used to simulate the wind environment around the terrain and buildings of Zhuhai Airport,and the prone airspace of low-level wind shear at the airport under the background of north(N),north-northwest(NNW)and northeast(NE)wind were analyzed.The results show that:1)The wind speed fluctuations caused by terrain and buildings at the airport runway under the three wind directions all appear below the height of 500 m,and all of them mainly appear along the runway.2)When the wind direction is N or NNW,the wind shear appears at the height of 100-500 m and is mainly induced by the terrain.3)When the wind direction is N,the maximum probability of low-level wind shear is outside the southern end of the runway(in the area of 0.5-1.4 km from the southern end)and the second is near the southern end(0.2-1.5 km from the southern end within the runway);when the wind direction is NNW,the maximum probability of low-level wind shear is near the south end of the runway(0.5 km outward from the port to 1.1 km inward from the port)and the second is near the midpoint of the runway about 0.3 km.4)When the wind direction is NE,the probability of low-level wind shear on the airport runway is low.The research results provide a basis for the detection and early warning of low-level wind shear at Zhuhai Airport to prevent wind shear and have significance for airport location and aviation safety meteorological risk assessment in the future.
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